R.swift

Get strong typed, autocompleted resources like images, fonts and segues in Swift projects

Why use this?

It makes your code that uses resources:

Fully typed, less casting and guessing what a method will return
Compile time checked, no more incorrect strings that make your app crash at runtime
Autocompleted, never have to guess that image name again

Currently you type:

let icon = UIImage(named: "settings-icon")
let font = UIFont(name: "San Francisco", size: 42)
let viewController = CustomViewController(nibName: "CustomView", bundle: nil)
let string = String(format: NSLocalizedString("welcome.withName", comment: ""), locale: NSLocale.current, "Arthur Dent")

With R.swift it becomes:

let icon = R.image.settingsIcon()
let font = R.font.sanFrancisco(size: 42)
let viewController = CustomViewController(nib: R.nib.customView)
let string = R.string.localizable.welcomeWithName("Arthur Dent")

Check out more examples or hear about how Fabric.app uses R.swift!

Demo

Autocompleted images:

Compiletime checked images:

This is only the beginning, check out more examples!

Features

After installing R.swift into your project you can use the R-struct to access resources. If the struct is outdated just build and R.swift will correct any missing/changed/added resources.

R.swift currently supports these types of resources:

Runtime validation with R.validate():

If all images used in storyboards and nibs are available
If all view controllers with storyboard identifiers can be loaded
If all custom fonts can be loaded

Q&A

Installation

CocoaPods is the recommended way of installation, as this avoids including any binary files into your project.

Note on Carthage: R.swift is a tool that used in a build step, it is not a dynamic library. Therefore it is not possible to install it with Carthage.

CocoaPods (recommended)

There is also a short video of this instruction.

Add pod 'R.swift' to your Podfile and run pod install
In Xcode: Click on your project in the file list, choose your target under TARGETS, click the Build Phases tab and add a New Run Script Phase by clicking the little plus icon in the top left
Drag the new Run Script phase above the Compile Sources phase and below Check Pods Manifest.lock, expand it and paste the following script: "$PODS_ROOT/R.swift/rswift" "$SRCROOT"
Build your project, in Finder you will now see a R.generated.swift in the $SRCROOT-folder, drag the R.generated.swift files into your project and uncheck Copy items if needed

Tip: Add the *.generated.swift pattern to your .gitignore file to prevent unnecessary conflicts.

Manually

Add the R.swift.Library to your project
Download a R.swift release, unzip it and put it into your source root directory
In Xcode: Click on your project in the file list, choose your target under TARGETS, click the Build Phases tab and add a New Run Script Phase by clicking the little plus icon in the top left
Drag the new Run Script phase above the Compile Sources phase, expand it and paste the following script: "$SRCROOT/rswift" "$SRCROOT"
Build your project, in Finder you will now see a R.generated.swift in the $SRCROOT-folder, drag the R.generated.swift files into your project and uncheck Copy items if needed

Tip: Add the *.generated.swift pattern to your .gitignore file to prevent unnecessary conflicts.

Homebrew (Unofficial)

R.swift is also available through Homebrew. This makes it possible to install R.swift globally on your system. Install R.swift by running: brew install rswift. The Homebrew formula is maintained by @tomasharkema.

Contribute

We'll love contributions, read the contribute docs for info on how to report issues, submit ideas and submit pull requests!

License

R.swift and R.swift.Library are created by Mathijs Kadijk and released under a MIT License.

rwinzhang/R.swift